6 day run (Pikmin 2)
A 6 day run is where a player completes Pikmin 2 in 6 days by collecting all 201 treasures. This is achieved by collecting each type of Pikmin on the first possible day, with both Blue Pikmin and White Pikmin on day 3, and completing the Awakening Wood, Perplexing Pool, and Wistful Wild in a single day each. In order for this to be possible, several exploits and glitches need to be used.
Because the Blue Pikmin don't respond to the leader's whistle, it is currently not known if a 6 day run on the New Play Control! version is possible. By using glitches it is possible to get Blue Pikmin, but it is a lot more time consuming in general.
The following is a brief outline of a 6 day run. The order of some days can be moved around – for example, after the Awakening Wood, the player can either finish the Valley of Repose or tackle the Perplexing Pool. What matters is that the debt is repaid at the end of the fourth day.
This is the same as in any other run through the game. Unless you're in a speedrun where time is critical, let your Red Pikmin grow to flower status before plucking them, to increase their performance.
Note: All overground treasures must be collected before completing the final caves so that you can clear out the area before the day ends. This is because the debt clearing cutscene (which can only happen while above-ground) instantly ends the day.
The first few recorded low day runs collect all treasures in 8 days. These runs have few major glitches, and simply go through all eight milestones in the order intended by the developers:
Though smaller glitches and tricks were found in the meantime, the lowest number of days required to collect all treasures was kept at 8 for several years.
On June 30th, 2012, Claris discovered the seesaw block glitch (then called "scale glitch"), which allowed for Blue Pikmin to be unlocked in the first visit to the Awakening Wood. This removed one day from the total, since players can use the Blue Pikmin to complete the Perplexing Pool in a single day. It was still necessary to return to the Awakening Wood in a different day, since one needed to use Yellow Pikmin to open up the electric gate and retrieve the Decorative Goo.
On July 2nd, 2012, the first 7 day run was completed, also by Claris.
On March 24th, 2018, "muratsubo" discovered a glitch that allows Pikmin to carry an object at much faster speeds than normal. Over the next days, speedrunners attempted to find time-saving uses for the glitch, and the idea of using it to get the Decorative Goo over the gate was instantly brought up. Several experiments were made to get it to work. Eventually, it was proven to be possible to bring the Decorative Goo outside of the Blue Pikmin den without needing Yellow Pikmin, provided the treasure is "charged" with enough speed or luck.
On April 2nd, 2018, "HSS0136" used that same glitch and completed the entirety of the area in the same day. This knocked the day total from seven to six.